Bearing plane



Nov. 15, 1927.

J. J. JOHNSTON BEARING PLANE Filed May 28. 1927 JOHN JOSEPH JOHNSTON,

PATENT OFFICE- OF BENSON, MINNESOTA.

BEARING PLANE.

Application filed May 28,

The present invention relates to improvements iif bearing planes and has for an ob ject to provide an improved tool for truing faces or surfaces of gasoline motor connecting rods and main bearings, although the implement will be found of general utility in automobile and railroad shops and wherever a file surface is necessary.

An object of the invention is to provide a fixed file surface against'which the part to be trued may be moved to avoid the difficult use of the present file which must be reciprocated against the fixed surface.

This diificulty in the use of the ordinary file is, even in a skilled mechanics hands,

the cause of ruin of a large number of mechanical parts and it is an object of the present invention to eliminate this difiiculty and to provide a fixed and extensive .file surface which will enableeven the novice to perform a correct and accuratejob.

With the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more par- 8 ticularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols .refer to like or corresponding parts throughout the several views,

Figure 1 is a perspective of an improved bearing plane constructed according to the present invention;

Figure 2 shows an elevation of a vise with the bearing plane, illustrated in section, mounted therein;

Figure 3 is a bottom perspective of the improved bearing plane; and,

Figure 4 is a bottom perspective view of a slight modification.

Referring more particularly to Figures 1, 2 and 3, 5 represents a relatively thin, long and wide metallic plate on the upper working surface of which is Wrought a milled file cutting face 6. On the reverse side ofthe plate 5, as shown in Figure 3, is a central longitudinal rib 7, substantially rectangular in cross section and transverse end ribs 8 and 9 with the central portions of which the longitudinal rib 7 merges. The transverse ribs 8 and 9 are disposed flush with the ends of the plate 5.

As shown in Figure 4, the milled file plate 5 is provided upon its reverse face with the reinforcing rib 7 but the transverse ribs are dispensed with, and companion longi 1927. Serial No. 194,985.

tud-inal side ribs 10 and 111 are provided being parallel with the central rib and' spaced These, side ribs are substantial the plate 5 and the side faces of the rib 7.

The bearing plane may be clamped in the vise or it may be placed upon a work bench. The bearing cap and bearing are held in the right hand while being pushed along the file cutting surface 6, the left hand being used to steady the work and keep the same down with appropriate pressure against the milled cutting surface. The hearing or other work is pushed back and forth along this cutting surface 6 until the desired amount of abrasion is performed. The requisite result will usually be had in three or four movements. The bearing cap is then reversed and the process repeated. It willbe found comparatively easy to secure a true surface for the bearing cap and also for the bearing. The tool is universal for all motor hearing. will preferably be 14L in. long, 6 in. wide, and A; in. thick. The plate 5 may be cut with the file surface and be made separately from the ribs which may be of different ma terial electrically welded or otherwise secured or by drop forging, or rolling same.

The rib 7 may advantageously be 1 in. in width in. in depth. The transverse ribs 8 and 9 are also of the same Width and depth as are the ribs shown in Figure 4. The rib 7 in Figure 3, will act not only as a support, as above stated, but will also reinforce the comparatively thin plate 5 and prevent its warping or buckling along transverse lines throughout its length. The transverse ribs 8 and 9 stiffen the ends of the plate 5 and they intersect at right-angles and join with the longitudinal rib 7 thus providing a strong structure and one that will prevent a the warping or buckling of the bearing plate 5 also, along longitudinal lines.

The side longitudinal ribs 10 and 11 in Figure 4 stiffen the plate 5 along its side The milled file face i ed es and the presence of the three longitudinal reinforcing ribs which extend all the Way to the ends of the plate 5 sutliciently stifien the plate against both longitudinal and transverse stresses.

It will be obvious that many changes in the construction, combination and arrangement of parts could be made, Which could be used Without departing from the spirit of my invention, and I do not mean to limit the invention to such details, except as particularly pointed out in the claim.

Having thus described my invention, what I claim and desire to secure by Letters Patsubstantially flush with the ends of said plate.

JOHN JOSEPH JOHNSTON. 

